Fig. 8: Annual variations in co-occurring keywords in ICHD research within the WoS database (2006–2024).

This timeline visualization highlights the annual emergence and clustering of keywords related to intangible cultural heritage digitalization (ICHD) in Chinese literature. Larger circles represent higher keyword frequency, with “数字化” (digitization), “保护” (preservation), and “文化遗产” (cultural heritage) as central themes. The color gradient indicates different years of appearance from 2006 (purple) to 2025 (yellow), while lines denote co-occurrence relationships between keywords.